Introduction to computers and office automation Module :1 Types of computers
WHAT IS COMPUTER A computer is an electronic device that processes data and performs tasks according to a set of instructions called programs or software. It consists of hardware components (like the central processing unit (CPU), memory (RAM), storage devices, and input/output devices) and software that enables it to perform a wide range of functions.
TYPES OF COMPUTERS Analogue computer Digital computer Digital computers are further categorized as follows − Micro computer Mini computer Mainframe computer Super computer Hybrid computer
Analogue computers Is a computer which processes analogue data. The analogue computers were used during 1950s–1960s. Pressure, temperature, voltage, speed, and weight are examples of data which handled by analogue computers. Analogue computers are most widely used in aircraft, ships, submarines, and daily appliances like refrigerator, speedometer, etc. Types of Analogue Computers: Thermometer, Speedometer, Analogue clock, Volt meter, Tide predictors
Digital Computer The digital computers are the type of computers that uses discrete data(0,1) to perform computations. It performs a wide range of tasks by executing programmed instructions. Digital computers are the backbone of modern computing technology and are used in various applications, from personal computing to complex scientific calculations. Microcomputers, minicomputers, mainframe computers and supercomputers are some of the examples of digital computers.
Microcomputer It is a type of computer which is smaller in size and less powerful than mainframe and minicomputer systems. Desktops : Stationary personal computers designed for regular use at a single location. Laptops : Portable computers with integrated displays and keyboards. Tablets : Touchscreen devices that are highly portable and often lack a physical keyboard. Smartphones : Handheld devices that combine computing capabilities with cellular communication.
minicomputers Minicomputers are mid-sized computers that fall between microcomputers and mainframes in terms of processing power and capacity. They are typically used in business environments for tasks that require more power than a microcomputer but do not need the full capabilities of a mainframe. Can support multiple users at the same time through time-sharing. Users can access the minicomputer via terminals.
Mainframe computer A mainframe computer is a powerful, high-performance computer used primarily by large organizations for critical applications, bulk data processing, such as census, industry and consumer statistics, enterprise resource planning, and large-scale transaction processing. Mainframes are known for their large size, significant processing power, high levels of reliability, and scalability.
Super computers Supercomputers are highly advanced computing systems designed to perform complex calculations at extremely high speeds. They are used for a variety of specialized applications that require immense processing power, including scientific research, weather forecasting, cryptography. Supercomputers are characterized by their ability to process massive amounts of data and perform trillions of calculations per second.
Hybrid computers Hybrid computers combine features of both analog and digital computers. They are designed to provide the speed of analog computation and the precision of digital computation, making them suitable for specific applications that require both types of processing. Example Hybrid Systems: Flight Simulators : Combine analog components to simulate the continuous nature of flight dynamics and digital components for precise calculation and control. Medical Imaging Systems : Such as MRI and CT scanners, which use analog-to-digital conversion to process the signals received from the body into accurate digital images.